This Technical Reference Manual slot provides information for the maintenance and service of the Datex-Ohmeda S/5 Recorder Module, E-REC. The REC module is a double width plug-in module designed for use with the Datex-Ohmeda modular monitors. Later in this manual the module may be referred to without S/5 for simplicity. The service menu is described in a separate “Service Menu“ slot and the spare part lists in the “E-Modules Spare Parts” slot. The Recorder Module, E-REC, provides real time printing of waveform and numerical data, and trend data.